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stratified sampling if the population from which a sample is to be drawn does not constitute a homogenous group then stratified sampling technique is
where an element of randomness is introduce by suing random numbers to pick up the unit with which to start this process of sampling is known as
this type of sampling is also known as chance sampling or probability where each and every item in the population has an equal change of inclusion in
least squares method of fitting a line the line of best fit or the regression line through the scatter diagram is a method which minimizes the sum
linear regression is widely used in biological behavioral and social sciences to describe relationship between variables it ranks as one of
linear regression is a regression methods that models the relationship between a dependent variable independent
if a series of three observations has a mean andd median of 4 and mean absolute deviation of 43 what is the
a researcher is interested in the relationship between fathers performance in high school and their childrens social skills she obtains the high
which type of correlation would be appropriate to calculate for the each of the following sets of dataa correlating gender and year in
we find the correlation coefficient and plot the scatter plot using excel as follows time in waiting room heart ratetime in
the correlation coefficient can take values from -1 to 1 if the correlation coefficient lies in the range -10 then we say that the correlation is
the pivot table is as belowvaluesrow labelssum of idsum of risk levela6912b14132grand total21044this pivot table gives the cross table of all the
the descriptive statistics outputs for both the variables are as belowwii groupmean958standard error309408median96mode88standard
ia sionusodial signal has the formxt asintderive an expression for the autocorrelation rxxlambdaii explain the significance of this result in
i for a 3 term averagin filter write a difference eqatuon governing the filter and dervie the corresponding z transform sketch a pole zero plot
a sine wave is sampled at interval tand quantixed using n2bits precision over the range plusmn1 the sine wave has peroid tau and t is chosed such
3 you generate a null hypothesis that 32 you draw a random sample of size n 28 from the
1 public health scholars have noted a relationship between nancial well-being follow-ing catastrophe and rates of depression weber kenny and bratton
flifla sells tomatoes every day in suk al marqazi the downtown fruit and vegetable market he finds that he can order tomatoes in crates of 25 kg and
1 sketch and explain different regions of a pressure-volume diagram of a full cardiac cycle2 sketch and explain the relationship between cardiac
consider two firms producing an identical product in a market where the demand is described by p 1 200 - 2y the corresponding cost functions are c1
a statistics are collecting organizing summarizing and presenting a set of datab inferential statistics is the learn of a sample that enables us
a drainage system overows into a river causing pollution when the rainfall falling in an hour exceeds 50 mm during any given year the maximum hourly
the lifetime t in days of an electrical component has reliability function given by rt e-001t for time t gt 0 an electrical system consists of four
suppose the arrival times of phone calls in a help centre follow a poisson process with rate 20 per hour so the inter-arrival times are independent